/*
 * Copyright (c) 2024 Yunshan Networks
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package stats

import (
	"runtime"
	"time"

	"github.com/deepflowio/deepflow/server/libs/utils"
)

type GcMonitor struct {
	utils.Closable

	lastPauseDuration uint64
}

func (t *GcMonitor) GetCounter() interface{} {
	memStats := runtime.MemStats{}
	runtime.ReadMemStats(&memStats)
	gcDuration := memStats.PauseTotalNs - t.lastPauseDuration
	t.lastPauseDuration = memStats.PauseTotalNs
	return []StatItem{{"duration", gcDuration}}
}

func RegisterGcMonitor() {
	registerCountable("", "gc", &GcMonitor{}, OptionInterval(time.Second))
}
